Year 9 Science Test- Chemistry

Froggy Jumps

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Atoms, ions, and balancing basics

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Agatha Green

Australia

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Year 9 Science Test- Chemistry


Froggy Jumps Year 9 Science Test- ChemistryVersion en ligne Atoms, ions, and balancing basics par Agatha Green 1 Which subatomic particle has a negative charge? a Neutron b Proton c Electron 2 Which particle has no electric charge and contributes to mass? a Neutron b Proton c Electron 3 What does the law of conservation of mass state in a closed system? a Mass is created during reactions b Mass is conserved during chemical reactions c Mass increases with reactions 4 Balance the equation: Fe + O2 -> Fe2O3. What are the balanced coefficients? a 1 Fe + 1 O2 -> Fe2O3 b 2 Fe + 1 O2 -> Fe2O3 c 4 Fe + 3 O2 -> 2 Fe2O3 5 What is an ion? a A neutral atom b An atom with a net electric charge c A molecule with no charge 6 In an acid, what color does blue litmus paper turn? a Blue b Red c Purple 7 A solution with pH 2 is: a Basic b Neutral c Acidic 8 Which particles make up the nucleus of an atom? a Protons and neutrons b Electrons and neutrons c Electrons and protons 9 What defines an element? a A substance that cannot be broken into simpler substances by chemical means b A substance that can be easily split c A mixture of atoms 10 In a chemical reaction, the total mass of reactants equals the total mass of what? a Catalysts b Energy c Products 11 What does the atomic number of an element represent? a Number of protons in the nucleus b Total number of electrons c Average mass of the atom 12 pH measures how acidic or basic a solution is. What pH value is neutral? a 7 b 14 c 0 13 Balance the following equation: H2 + O2 -> H2O. What is the correct coefficient for H2O? a 2 b 1 c 3 14 What is formed when an acid reacts with a base in a neutralisation reaction? a Hydrogen gas b Water and a salt c Oxygen gas 15 Which statement describes a chemical reaction? a No atoms are rearranged b Energy is always released c New substances are formed with different properties 16 In a balanced equation, atoms must be conserved. Which law does this illustrate? a Law of definite proportions b Law of multiple proportions c Law of conservation of mass

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Year 9 Science Test- Chemistry

Froggy Jumps

À propos de cette activité

Créé par

Téléchargez la version pour jouer sur papier

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Year 9 Science Test- ChemistryVersion en ligne

par Agatha Green

Which subatomic particle has a negative charge?

Which particle has no electric charge and contributes to mass?

What does the law of conservation of mass state in a closed system?

Balance the equation: Fe + O2 -> Fe2O3. What are the balanced coefficients?

What is an ion?

In an acid, what color does blue litmus paper turn?

A solution with pH 2 is:

Which particles make up the nucleus of an atom?

What defines an element?

In a chemical reaction, the total mass of reactants equals the total mass of what?

What does the atomic number of an element represent?

pH measures how acidic or basic a solution is. What pH value is neutral?

Balance the following equation: H2 + O2 -> H2O. What is the correct coefficient for H2O?

What is formed when an acid reacts with a base in a neutralisation reaction?

Which statement describes a chemical reaction?

In a balanced equation, atoms must be conserved. Which law does this illustrate?